Update, September 2, 2021: the GPU nodes are available again.

Original message:

Dear cluster users,

the GPU nodes are not yet available again. We will notify you when they are.

Best regards
Your HPC Team

Dear cluster users,
we would like to remind you all of the upcoming maintenance of the OMNI cluster. The cluster will be unavailable from Thursday, August 26, 2021 7:00 AM to Monday, August 30 in the morning. We apologize for this extended disruption, which became necessary due to electrical work at Hölderlin campus.

During the maintenance window we will also make changes to the permissions of your Home directories. The change will affect users who already had a Home on HorUS. On HorUS, all users had read access to each others’ Home directories (755 in the octal notation). We will remove these permissions (700 in the octal notation) to harmonize this with the new OMNI Homes. If you would like to change it back, you can do this with the following command:

chmod 755 /home/<Your Username>

If you never had access to the HorUS cluster, nothing will change for you.

Best regards
Your HPC Team

Dear cluster users,

on Saturday, August 7 2021 around 7 in the morning, the compute nodes of OMNI were shut down automatically due to a false alarm of the fire detection system. We are currently rebooting all nodes, but we cannot yet say how long this will take.

Please check all jobs that you suspect were running at this time. Jobs in the waiting queues will start normally when we have rebooted the compute nodes.

Best regards
Your HPC Team

Dear cluster users,

on Thursday, August 26, 2021 necessary maintenance work will be performed on the OMNI cluster. Currently running jobs will not be affected. Queuing new jobs is also still possible without restrictions, however if the runtime will overlap with the maintenance interval (e.g. a 10-day job queued on August 17), the job will only start after the maintenance.

Best regards
Your HPC Team

Dear cluster users,

yesterday we had a problem with the filesystems /work and /fast on OMNI. Some jobs crashed. We highly recommend that you check whether your jobs were among them.

The problem has been fixed. We apologize for the inconvenience.

Best regards
Your HPC Team

Dear cluster users,

as we have already announced, we will deactivate the HoRUS cluster tomorrow. From that point on, the HPC address will point to the OMNI cluster.

Since your home directories are the same on HoRUS and OMNI, they will remain available. However we will change the default permissions for home directories such that other users do not have Read access any more (as was the default on HoRUS). If you would like to change that, you can use the chmod command to change permissions on directories you own.

All other directories on HoRUS will no longer be accessible. Please check that you have migrated all data that you want to keep. Tips on transferring data can be found here: https://cluster.uni-siegen.de/transition/?lang=en

Best regards
Your HPC Team

Dear cluster users,

the next Linux introduction course will be held on July 15, 2021 and take all day. It will be a virtual course using Zoom. For further information as well as how to register see this link.

Best regards
Your HPC team

Dear cluster users,

we will deactivate the compute nodes of the HoRUS cluster on June 7, 2021. Logging in will still be possible until June 30 so you can migrate data. Please move the data from all your workspaces away from HoRUS as soon as possible.

Best regards
Your HPC Team

Dear cluster users,

due to the large interest in the last Julia workshop there will be a second identical one. You can find registration and other details below.

Best regards
Your HPC Team

We would like to invite you to the Julia Workshop, 22-24 of June 2021, organized by the competence network HPC.NRW and Paderborn Center for Parallel Computing (PC²). 
Julia is a new and exciting language for scientific computing, data analysis and many other purposes.

The Julia Workshop is suitable for beginners and intermediates. The only prerequisites are a strong interest to dive into Julia and basic knowledge in any programming language. 
The event includes Hands-on and Q&A sessions. Details about the topics covered and the registration can be found at: 

https://events.uni-paderborn.de/e/julia2021S

The number of seats is limited and the allocation of seats is done by the HPC.NRW member universities. The course is free of cost for members of German universities or publicly-funded research institutions in Germany. 

We would be happy if you could forward this announcement to potentially interested students or colleagues. 

Best Wishes 
The competence network for high-performance computing in NRW: HPC.NRW

Dear cluster users,

we have partnered with renowned C++ programming trainer Klaus Iglberger to bring you a 4-day online intermediate-level C++ course for free. The course will take place in the week from June 15 to 18 and will be held in English. It is the followup course to the beginners’ course Mr. Iglberger gave last year. 

You can register and find more details on the course topics here: https://events.uni-paderborn.de/e/cppintermediate

Note that this course requires some C++ experience, either from the previous course or equivalent (you can find the previous course’s topics here).

Mr. Iglberger has many years of experience both in scientific programming and in giving courses like this one to academic and industry customers. We are lucky to get this chance as his schedule is normally booked years in advance.

We only have two conditions:

1. Please give detailed feedback. We are using this course as a test for future courses run in cooperation with other universities in NRW. You will be asked to fill out a feedback form at the end of the course.
2. Out of fairness to your colleagues please only register if you are certain that you will attend. If you have to cancel before the course, please tell us. This will give people on the waiting list a chance to attend.

The course will be held online via Zoom. Meeting details will be emailed to all participants shortly before the first day of the course.

Best regards
Your HPC Team